Gbinding-mill



' A. ARNOLD.

Grinding Mi ll.

Patented Sept. 15, 1857.

UNITED STATES PATENT OFFICE.

AARON ARNOLD, OF TROY, NEW YORK.

GRINDING-MILL.

Specification of Letters Patent No. 18,178, dated September 15, 18.57.

To all whom it may concern:

Be it known that I, AARON ARNOLD, of Troy, in the county of Rensselaer and State of New York, have invented certain new.

and useful Improvements in. Portable Grinding-Mills; and I do hereby declare the following to be a full, clear, and exact description of the construction and .operation of the same, reference being had to the accompanying drawings, making part of this specification, in which- Figure 1 represents a perspective of the mill complete. Fig. 2 represents a longitudinal vertical section through the hopper and curb or case, and leaving the shaft, disk, and cone, in full or uncut. Fig. 3 represents in perspective the hopper and concave, detached from the-mill. Fig. 4 represents in perspective the cut or sectional cone, and disk on their shaftalso detached from the mill. Fig. 5 represents a vertical cross section through the hopper, concave or case, and the cut cone. Fig. 6 represents in perspective the face plate and shaft, the former having upon it ribs and wings, for creating a current of air through the grinding surfaces, and for clearing out the case, and preventing it from being choked or clogged by the ground material.

Similar letters of reference where they occur in the several figures, denote like parts of the mill in all of them.

The nature of my invention relates to the grinding apparatus of the mill, and consists in the cut or sectional cone, and in connection therewith the disk and their arrangementon the shaft, so as to be readily removed, and replaced by others when worn out.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation, in connection with the drawings.

A represents the frame of the mill, made of cast iron or otherwise, and in suitable boxes or bearings B, on this frame, turns the shaft G which operates the moving parts of the mill. On the shaft C, is a pulley D, over which may pass an endless belt leading from any first moving power, to give motion to said shaft, and through it to the several parts of the mill. A curb or case E, is permanently secured to the frame A, by lugs resting thereon, and screws passing through them. And to other lugs a, a, on said curb or case E, is attached tightly by screws or otherwise, the flange F, of the concave G, said flange and concave being cast in one piece. The shaft C, passes through or rather into the case E, and. upon its inner end is fastened a face plate H, and to this face plate is secured by screws b (Fig. 4) or otherwise, the flange I, which is a part of, and cast with the cone J, and thus said flange or plate I, and the cone J receive their motion, by being connected to the shaft C, through the tight face plate H, and as said plate and cone, are the parts most subject to wear, by taking out the screws 5, new ones can be substituted therefor, at a very small cost, duplicates of this part of the mill being made for this purpose, and made to fit the face plate exactly, so that any one can make the change.

The flange F, concave G, and case E, when united, as seen in Fig. 2, form a close chamber within which the face plate H, plate I, and cone J, revolve; and on the back of the face plate I make curved ribs or projections 0, which draw in between the shaft and the case, a current of air and forcing it through between the grinding surfaces to the exit (at d, Fig. 3) not only keeps the mill from heating, but aids ,to carry the ground material out of the mill. On the periphery of the face plate H, are short arms 6, which also serve to force out the ,meal, and prevent its clogging in the case or curb.

On the plate or flange I, are formed grooves or furrows, which act in concert with or against similar grooves or furrows on the flange F, and on the periphery of the plate I, are also clearers f, for loosening up the meal, and to prevent it from clogging.

The cone J, has opposite portions of it cut away as seen at 9, Figs. 4, 5, and the remaining portions furnished with grooves or furrows h, which act against other grooves or furrows i, in the interior of the concave G. The object in cutting away a portion of the cone is that ears of corn, or other large material that is to be ground by it, may fall into these cut away portions, and as the cone revolves be certain to be carried around where the grinding surfaces It, i, will catch and reduce it sufficiently, for the other grinding surfaces on the plate I, and flange F, to complete the operation.

On an upper frame K, supported on the main frame A, is a hopper L, and suspended underneath it is a shoe M, which is vibrated by a lever N, pivoted at n (Figs. 2, 3), and operated by an eccentric m, on the end of the cone J. The material to be ground as it leaves the shoe M, falls into a second hopper O,'Which may be cast with the concave G, and from this hopper it is caught and forced by the depressions in the cone against the grinding surfaces as above stated.

At the end of the frame A, there is a screw rod 0, which bears against the end of the shaft C, and by means of the handle 10, this screw rod'is run up, forcing the shaft C, and the disk I, and cone J, against their opposing grinding surfaces, to regulate the dis-' tance between said surfaces and the quality of the meal or ground material.

The mill thus made is very simple, cheap,

and effective.

Having thus fully described my invention what I claim therein as new and desire to secure by Letters Patent is I 1. The combination of the rotating disk or plate I, and cut or sectional cone J, with the interior of the concave G, and flange F, for the purpose of feeding into the mill, and grinding large substances, such as corn on the cob, and as set forth.

2. I also claim securing the cone, and disk or plate I, to the shaft, through the intervention of the face plate H, substantially as herein set forth, so that said cone and disk may at any time be removed and replaced by others when they become dull, or worn away.

AARON ARNOLD. Witnesses:

DAVID DEFROST, WM. A. FELTON. 

